Executive Summary

            Since its establishment in January 2005, the Green Mark Scheme is now ten years into operation. In the recently published 3rd Green Building Masterplan, Building and Construction Authority (BCA) has announced its plans on having 80 per cent of all buildings Green Mark certified by 2030. To ensure that BCA keeps its target in sight, the organisation has also set interim goals from now till 2030. From the 1960s till January 2005, a large number of Housing Development Board (HDB) residential buildings were built to provide roofs over Singaporeans.  These estates are old and have yet to be retrofitted to be energy efficient for the Green Mark Certification. Team Old is Green has seen this problem as an opportunity and have set our sights on the potential of retrofitting existing residential buildings to make them energy efficient. This proposal discusses why the team decided to take on the problem of retrofitting existing residential buildings and a feasible solution that should be made aware of to all consumers. With the green movement, every building stakeholder will stand to reap benefits and protect Mother Earth from further deterioration. With this proposal in place, the team hopes to reach BCA’s target well before 2030.